Doorknob



Jan. 18, 1938. H. D. SHAW 2,105,617

DOORKNOB Original Filed Nov. 11, 1935 Patented Jan. 18, 1938 UNlTEDSTATES PATENT OFFICE DOORKNOB Harold D. Shaw, Fitchburg, Mass, assignorto Independent Lock Company, Fitchburg, Mass., a corporation ofMassachusetts 2 Claims.

This application is a division of my prior application on a Doorknobfiled November 11, 1935, Serial No. 49,129.

The principal objects of this invention are to 5 provide a constructionin which a fine adjustment can be made between the thimble of the knoband the spindle so that wear can be taken up to avoid the rattling ofthe knob and at the same time of such an extent that it can be used 10for applying the knob to doors of very different thicknesses; to providemeans for holding the knob with respect to the spindle under anycondition of adjustment without the use of the usual radial screw; toprovide positive means for holding the adjustment, and to provide asimple form of cap for the knob which can be removed easily in case ofnecessity.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying 20 drawing, in which Fig. lis a sectional View of a knob constructed in accordance with thisinvention;

Fig. 2 is a side view with the parts separated;

Fig. 3 is a view of the main part of the knob looking in the directionof the arrow 3 in Fig. 2;

Fig, 4 is a view looking in the direction of the arrow 4 in Fig. 2; and

Fig. 5 is an end view of the thimble.

In the form shown in all the figures the usual spindle i is employed.Upon this spindle screws the shank l l and this shank is adjusted backand forth on the screw-threads for adjusting it to different thicknessesof doors and taking up any slack due to inaccurate setting or to wear.The

" shank is provided at its outer end with a noncircular projection l2,in this case shown as hexagonal, this part projecting from a circularfiat surface l3 near the end of the shank.

The knob M which may be made of glass, metal or other solid material, isprovided with a circular recess I for receiving the surface l3 of theshank and with a perforation iii of the same shape as the projection l2to receive that projection and provide a positive connection between thetwo so that the shank and knob will turn together. On the inside theknob is provided with a flat surface I! opposite the annular re- 5 cessl5.

The knob M has a central perforation 38 and the flat surface l7. At theother end it has a simple shouldered circular recess 40.

A cap 4| simply has an externally threaded central projection 42screwing into a collar 43. The threaded spindle l0 screws into the otherend of the collar. A washer 44 surrounds the spindle against the surfaceH. A spring 45 bears against the washer 44 and cap 4| to apply pressureto the cap. The collar 43 being threaded on the spindle l0 and on thecap 4| and the cap being held by the spring 45, the turning of theannulus M will be transmitted to the spindle l0 through the cap 4| andcollar 43. This constitutes a simple arrangement. 1 It is less expensiveto make and maintain than the form shown in the first sheet of my aboveidentified application.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

l. The combination with a door knob and means for adjustably securing itto a threaded spindle, said knob having an open end, of a cap located insaid open end, a member in threaded connection with the cap and with thespindle to hold the cap against displacement, and yielding means forexerting an outward pressure on the cap.

2. The combination with a door knob and means adjustably securing it toa threaded spindle, said knob having an open end, of a cap located insaid open end, a collar connected with the cap by screw threads, and aspindle con- 0 nected with the collar by screw threads.

HAROLD D. SHAW.

